Resonant Raman Scattering Study of Strain and Defects in Chemical Vapor Deposition Grown MoS2 Monolayers.

The development of bottom-up synthesis routes for semiconducting transition metal dichalcogenides (TMDs) and the assessment of their defects are of paramount importance to achieve their applications. TMD monolayers grown by chemical vapor deposition (CVD) can be subjected to significant strain and, here, Raman and photoluminescence spectroscopies are combined to characterize strain in over one hundred MoS2 monolayer samples grown by CVD. The frequency changes of phonons as a function of strain are analyzed, and used to extract the Grüneisen parameter of both zone-center and edge phonons. Additionally, the intensity of the defect-induced longitudinal acoustic (LA) and transverse acoustic (TA) Raman bands are discussed in relation to strain and electronic doping. The experimental mode-Grüneisen parameters obtained are compared with those calculated by density functional theory (DFT), to better characterize the type of strain and its resulting effects on Grüneisen parameters. The findings indicate that the use of Raman spectra to determine defect densities in 2D MoS2 must be always conducted considering strain effects. To the best of the authors' knowledge, this work constitutes the first report on double resonance Raman processes studied as a function of strain in 2D-MoS2. The new approach to obtain the Grüneisen parameter from zone-edge phonons in MoS2 can also be extended to other 2D semiconducting TMDs.

Climate change and its influence in nephron mass.

PURPOSE OF REVIEW: The consequences of climate change, including heat and extreme weather events impact kidney function in adults and children. The impacts of climate change on kidney development during gestation and thereby on kidney function later in life have been poorly described. Clinical evidence is summarized to highlight possible associations between climate change and nephron mass. RECENT FINDINGS: Pregnant women are vulnerable to the effects of climate change, being less able to thermoregulate, more sensitive to the effects of dehydration, and more susceptible to infections. Exposure to heat, wildfire smoke, drought, floods and climate-related infections are associated with low birth weight, preterm birth and preeclampsia. These factors are associated with reduced nephron numbers, kidney dysfunction and higher blood pressures in offspring in later life. Exposure to air pollution is associated with higher blood pressures in children and has variable effects on estimated glomerular filtration rate. SUMMARY: Climate change has important impacts on pregnant women and their unborn children. Being born too small or too soon is associated with life-time risk of kidney disease. Climate change may therefore have a dual effect of impacting fetal kidney development and contributing to cumulative postnatal kidney injury. The impact on population kidney health of future generations may be significant.

Effects of post-transfer annealing and substrate interactions on the photoluminescence of 2D/3D monolayer WS2/Ge heterostructures.

The ultraflat and dangling bond-free features of two-dimensional (2D) transition metal dichalcogenides (TMDs) endow them with great potential to be integrated with arbitrary three-dimensional (3D) substrates, forming mixed-dimensional 2D/3D heterostructures. As examples, 2D/3D heterostructures based on monolayer TMDs (e.g., WS2) and bulk germanium (Ge) have become emerging candidates for optoelectronic applications, such as ultrasensitive photodetectors that are capable of detecting broadband light from the mid-infrared (IR) to visible range. Currently, the study of WS2/Ge(100) heterostructures is in its infancy and it remains largely unexplored how sample preparation conditions and different substrates affect their photoluminescence (PL) and other optoelectronic properties. In this report, we investigated the PL quenching effect in monolayer WS2/Ge heterostructures prepared via a wet transfer process, and employed PL spectroscopy and atomic force microscopy (AFM) to demonstrate that post-transfer low-pressure annealing improves the interface quality and homogenizes the PL signal. We further studied and compared the temperature-dependent PL emissions of WS2/Ge with those of as-grown WS2 and WS2/graphene/Ge heterostructures. The results demonstrate that the integration of WS2 on Ge significantly quenches the PL intensity (from room temperature down to 80 K), and the PL quenching effect becomes even more prominent in WS2/graphene/Ge heterostructures, which is likely due to synergistic PL quenching effects induced by graphene and Ge. Density functional theory (DFT) and Heyd-Scuseria-Ernzerhof (HSE) hybrid functional calculations show that the interaction of WS2 and Ge is stronger than in adjacent layers of bulk WS2, thus changing the electronic band structure and making the direct band gap of monolayer WS2 less accessible. By understanding the impact of post-transfer annealing and substrate interactions on the optical properties of monolayer TMD/Ge heterostructures, this study contributes to the exploration of the processing-properties relationship and may guide the future design and fabrication of optoelectronic devices based on 2D/3D heterostructures of TMDs/Ge.

CB1R chronic intermittent pharmacological activation facilitates amphetamine seeking and self-administration and changes in CB1R/CRFR1 expression in the amygdala and nucleus accumbens in rats.

Patterns of drug ingestion may have a dissimilar impact on the brain, and therefore also the development of drug addiction. One pattern is binge intoxication that refers to the ingestion of a high amount of drug on a single occasion followed by an abstinence period of variable duration. In this study, our goal was to contrast the effect of continuous low amounts with intermittent higher amounts of Arachidonyl-chloro-ethylamide (ACEA), a CB1R agonist, on amphetamine seeking and ingestion, and describe the effects on the expression of CB1R and CRFR1 in the central nucleus of the amygdala (CeA) and in the nucleus accumbens shell (NAcS). Adult male Wistar rats were treated with a daily administration of vehicle or 20 µg of ACEA, or four days of vehicle followed by 100 µg of ACEA on the fifth day, for a total of 30 days. Upon completion of this treatment, the CB1R and CRFR1 expression in the CeA and NAcS was evaluated by immunofluorescence. Additional groups of rats were evaluated for their anxiety levels (elevated plus maze, EPM), amphetamine (AMPH) self-administration (ASA) and breakpoint (A-BP), as well as AMPH-induced conditioned place preference (A-CPP). Results indicated that ACEA induced changes in the CB1R and CRFR1 expression in both the NAcS and CeA. An increase in anxiety-like behavior, ASA, A-BP and A-CPP was also observed. Since the intermittent administration of 100 µg of ACEA induced the most evident changes in most of the parameters studied, we concluded that binge-like ingestion of drugs induces changes in the brain that may make the subject more vulnerable to developing drug addiction.

Addressing Health Inequities and Disparities in Children With Kidney Disease in Disadvantaged Areas: the Latin American and Caribbean Experience.

Purpose of Review: Compared with high-income countries, healthcare disparities and inequities are more evident in low, lower-middle, and upper-middle-income countries with poorer housing and nutrition conditions. At least 20% of Latin America and the Caribbean are low and lower-middle-income countries. Despite the majority of the other countries being upper-middle income, the United Nations Children's Fund had classified all the regions as "less developed," with limited access to health care for the most vulnerable, the children. Latin America and the Caribbean regions represent an extensive territory with communication limitations and an unstable socio-political and economic environment. After considering the vast population affected by poverty worldwide and the long-term impact of kidney disease starting in childhood, it is crucial to better understand and analyze the multifactorial limiting conditions in accessing specialized care such as pediatric nephrology in disadvantaged areas. Recent Findings: Constraints in accessing basic healthcare in rural areas make it impossible to receive specialized pediatric nephrology care including dialysis and transplantation. Disturbingly, incidence and prevalence figures of acute kidney injury, chronic and end-stage kidney disease in some Latin American and the Caribbean countries are unknown, and these conditions still represent a death sentence for underprivileged populations. However, the monumental efforts of the dedicated healthcare providers and stakeholders that pioneered the actions in the past 50 years have shown remarkable progress in developing pediatric nephology services across the continent. Summary: In this review, we compile some of the latest evidence about the care of children and adolescents with kidney conditions in Latin America and the Caribbean, along with the experiences from the field in the care of these patients facing adverse conditions. We also highlight recommendations to address inequities and disparities.

Spatial Control of Substitutional Dopants in Hexagonal Monolayer WS2 : The Effect of Edge Termination.

The ability to control the density and spatial distribution of substitutional dopants in semiconductors is crucial for achieving desired physicochemical properties. Substitutional doping with adjustable doping levels has been previously demonstrated in 2D transition metal dichalcogenides (TMDs); however, the spatial control of dopant distribution remains an open field. In this work, edge termination is demonstrated as an important characteristic of 2D TMD monocrystals that affects the distribution of substitutional dopants. Particularly, in chemical vapor deposition (CVD)-grown monolayer WS2 , it is found that a higher density of transition metal dopants is always incorporated in sulfur-terminated domains when compared to tungsten-terminated domains. Two representative examples demonstrate this spatial distribution control, including hexagonal iron- and vanadium-doped WS2 monolayers. Density functional theory (DFT) calculations are further performed, indicating that the edge-dependent dopant distribution is due to a strong binding of tungsten atoms at tungsten-zigzag edges, resulting in the formation of open sites at sulfur-zigzag edges that enable preferential dopant incorporation. Based on these results, it is envisioned that edge termination in crystalline TMD monolayers can be utilized as a novel and effective knob for engineering the spatial distribution of substitutional dopants, leading to in-plane hetero-/multi-junctions that display fascinating electronic, optoelectronic, and magnetic properties.

Histopathological Changes of Long-Term Peritoneal Dialysis Using Physiological Solutions: A Case Report and Review of the Literature.

BACKGROUND: Long-term peritoneal dialysis (PD), especially with nonphysiological solutions, is afflicted with the severe complication of encapsulating peritoneal sclerosis (EPS). Physiologic PD solutions have been introduced to reduce pH trauma. Data on peritoneal biopsies in pediatrics with long-term PD using physiological solutions are scant. CASE REPORT: We report an adolescent who had been on 10-h continuous hourly cycles using mostly 2.27% Physioneal™ for 5 years. There were two episodes of peritonitis in October 2017 (Klebsiella oxytoca) and May 2018 (Klebsiella pneumoniae), which were treated promptly. This adolescent, who lost two kidney transplants from recurrent focal and segmental glomerulosclerosis, underwent a peritoneal membrane biopsy at the time of a third PD catheter placement, 16 months after the second renal transplant. Laparoscopically, the peritoneum appeared grossly normal, but fibrosis and abundant hemosiderin deposition were noted on histology. The thickness of the peritoneum was 200-900 (mean 680) µm; normal for age of 14 years is 297 [IQR 229, 384] µm. The peritoneum biopsy did not show specific EPS findings, as the mesothelial cells were intact, and there was a lack of fibrin exudation, neo-membrane, fibroblast proliferation, infiltration, or calcification. CONCLUSIONS: While the biopsy was reassuring with respect to the absence of EPS, significant histopathological changes suggest that avoiding pH trauma may not ameliorate the effects of glucose exposure in long-term PD.

Longitudinal Changes in Cardiac Structure and Function in Pediatric Kidney Transplant Recipients.

BACKGROUND: Cardiovascular disease results in increased morbidity and mortality in pediatric kidney transplant recipients. Longitudinal changes in cardiac structure and function and the association with blood pressure control over time in pediatric kidney transplant recipients are unknown. METHODS: To determine the influence of blood pressure control on cardiac changes following pediatric kidney transplant, we conducted a retrospective cohort study of children who received their first kidney transplant at the Hospital for Sick Children from 2004 to 2015. Children were followed until transfer to adult care or censoring in July 2018. Cardiac structure and function parameters were collected from clinical echocardiograms and assessed using standardized scores. Blood pressure control was determined by systolic blood pressure Z scores (above or below the 90th percentile) in combination with antihypertensive medications. A segmented mixed-effects model assessed Z scores of interventricular septum thickness, left ventricular end-diastolic dimension, and left ventricular posterior wall dimension. RESULTS: Of 142 children included, 58% were men, mean age at transplant was 11 (±4.5) years, and average follow-up time was 4 (±3) years. All cardiac structural Z scores improved during follow-up. Interventricular septum thickness normalized at 4.0 years post-transplant. Left ventricular end-diastolic dimension normalized at 1.5 years post-transplant. Left ventricular posterior wall dimension normalized at 6.3 years post-transplant. Left ventricular mass index showed sustained improvement up to 12 years post-transplant. Individuals with uncontrolled blood pressure had increased left ventricular mass (ß=2.97 [95% CI, 0.77-5.16]). CONCLUSIONS: Cardiac structural abnormalities improve following kidney transplantation and normalize within 7 years, especially with controlled blood pressure. Strict blood pressure control is critical after pediatric kidney transplantation.

Mesoamerican Endemic Nephropathy (MeN): A Disease Reported in Adults That May Start Since Childhood?

Mesoamerican endemic nephropathy (MeN) is a type of chronic kidney disease (CKD) of uncertain etiology that occurs along the Pacific coast of the southern part of Mexico and Central America. During the past 20 years MeN has become a leading cause of death in the region, clamming close to 50,000 lives, with 40% of these deaths occurring in young people. The cause remains unknown, but most researchers believe in a multifactorial etiology that includes social determinants of poverty. Existing evidence suggests that subclinical kidney injury begins early in life and leads to a higher than expected prevalence of CKD among children in Central America. Access to health services in the region, specifically kidney replacement therapy, remains limited. We proposed a strategy to address the perceived needs and urge coordinated efforts of governments, academic organizations, and international bodies to develop a comprehensive plan of action to mitigate this situation among the vulnerable and economically disadvantaged population.

Aborto legal na infância retratado pela imprensa escrita brasileira: perspectivas para o cuidado / Aborto legal en la infancia retratado por la prensa escrita brasileña: perspectivas para el cuidado / Legal abortion in childhood portraited by the brazilian written press: perspectives for care

Objetivo: identificar e interpretar à luz das categorias gênero e geração as contradições contidas em reportagens da imprensa escrita brasileira sobre caso envolvendo uma menina vítima de violência sexual e consequente aborto legal. Método: estudo documental de abordagem qualitativa. Os dados foram coletados por meio de 78 reportagens publicadas em 2 jornais no período de agosto a outubro de 2020, por meio de instrumento semiestruturado. O tratamento foi realizado por análise de conteúdo temática com apoio do webQDA. Resultados: foram identificadas três categorias empíricas: Proteção da infância expressa na legislação e no discurso dos agentes públicos; Concepções sobre o aborto e a inviolabilidade da integridade da criança; Volição dos adultos versus a autonomia da criança. Considerações finais: as contradições identificadas nas reportagens da mídia escrita brasileira no caso de uma menina desvelaram que sua autonomia, assim como o direito à proteção da infância e descriminalização do aborto, não foram respeitados.

Objetivo: identificar e interpretar, a la luz de las categorías de género y generación, las contradicciones contenidas en los reportajes de la prensa brasileña sobre el caso de una niña víctima de violencia sexual y consecuente aborto legal. Método: estudio documental con enfoque cualitativo. Los datos fueron recolectados a través de 78 reportajes publicados en 2 periódicos de agosto a octubre de 2020, utilizando un instrumento semiestructurado. El tratamiento se realizó mediante análisis de contenido temático con apoyo de webQDA. Resultados: se identificaron tres categorías empíricas: Protección de la niñez expresada en la legislación y en el discurso de los agentes públicos; Concepciones sobre el aborto y la inviolabilidad de la integridad del niño; Voluntad adulta versus autonomía infantil. Consideraciones finales: los resultados revelan las contradicciones identificadas en el caso de una niña brasileña, cuya autonomía, así como el derecho a la protección de la infancia y la despenalización del aborto, no fueron respetados.

Objective: to identify and interpret, based on the gender and generation categories, the contradictions contained in Brazilian written press reports on a case involving a girl victim of sexual violence and consequent legal abortion. Method: this is a documentary study with a qualitative approach. Data were collected through 78 reports published in 2 newspapers from august to october 2020, using a semi-structured instrument. The treatment was performed by thematic content analysis with support from webQDA. Results: three empirical categories were identified: Child protection expressed in legislation and the discourse of public agents; Conceptions about abortion and the inviolability of the child's integrity; Adult volition versus child autonomy. Final considerations: the results reveal the contradictions identified in the case of a Brazilian girl, whose autonomy, as well as the right to protection of childhood and decriminalization of abortion, were not respected.

La utilización del Método de Análisis de Conceptos para la comprensión del concepto de Autorregulación a el Aprendizaje / A utilização do método de análise de conceitos para a compreensão do conceito de aprendizagem autorregulada / The use of concept analysis method to understand the concept of self-regulation learning

Nas últimas décadas, o termo autorregulação tem sido mencionado em pesquisas de diferentes áreas, entre elas a Educação. Devido a essa crescente utilização, questiona-se: quais são os elementos comuns no conceito de aprendizagem autorregulada apresentados em pesquisas internacionais? Neste estudo foram associados os métodos de revisão integrativa e de análise de conceitos. Na primeira etapa da análise de conceitos foi realizado um levantamento de artigos revisados por pares no Portal de Periódicos da CAPES, resultando em 372 trabalhos que permitiram indicar as áreas de utilização do termo. Na segunda etapa, aplicando os critérios de revisão integrativa, foram selecionados 67 trabalhos na base de periódicos ERIC. Entre os fatores comuns foi possível identificar que o processo de aprendizagem autorregulada inclui planejamento, autonomia, implementação de objetivos, metas e estratégias, controle de emoções, gerenciamento do tempo, valorização do conhecimento e execução de tarefas com êxito.

En las últimas décadas, el término autorregulación ha sido mencionado en investigaciones de distintas áreas, entre ellas la Educación. Debido a esa creciente utilización, se cuestiona: ¿cuáles son los elementos comunes en el concepto aprendizaje autorregulado presentados en investigaciones internacionales? En este estudio se asociaron los métodos de revisión integrativa y de análisis de conceptos. En la primera etapa del análisis de conceptos se realizó una recopilación de artículos revisados por pares en el Portal de Periódicos de la CAPES, resultando en 372 estudios que permitieron indicar las áreas de utilización del término. En la segunda etapa, aplicando los criterios de revisión integrativa, se seleccionados 67 estudios en la base de periódicos ERIC. Entre los factores comunes se identificó que el proceso aprendizaje autorregulado incluye planeamiento, autonomía, implementación de objetivos, metas y estrategias, control de emociones, gerenciamiento del tiempo, valoración del conocimiento y ejecución de tareas con éxito.

In recent decades, the term self-regulation has been mentioned in research in different areas, including Education. Due to this growing use, the question is: what are the common elements in the concept of self-regulation learning presented in international research? In this study, integrative review and concept analysis methods were associated. In the first stage of the concept analysis, a survey of peer-reviewed articles was carried out on the CAPES Periodicals Portal, resulting in 372 articles that allowed indicating the areas of use of the term. In the second stage, applying the integrative review criteria, 67 articles were selected from the ERIC journals. Among the common factors, it was possible to identify that the self-regulation learning process includes planning, autonomy, implementation of objectives, goals and strategies, control of emotions, time management, appreciation of knowledge and successful execution of tasks.

Quantification and Healing of Defects in Atomically Thin Molybdenum Disulfide: Beyond the Controlled Creation of Atomic Defects.

Atomically thin 2D materials provide an opportunity to investigate the atomic-scale details of defects introduced by particle irradiation. Once the atomic configuration of defects and their spatial distribution are revealed, the details of the mesoscopic phenomena can be unveiled. In this work, we created atomically small defects by controlled irradiation of gallium ions with doses ranging from 4.94 × 1012 to 4.00 × 1014 ions/cm2 on monolayer molybdenum disulfide (MoS2) crystals. The optical signatures of defects, such as the evolution of defect-activated LA-bands and a broadening of the first-order (E' and A'1) modes, can be studied by Raman spectroscopy. High-resolution scanning transmission electron microscopy (HR-STEM) analysis revealed that most defects are vacancies of few-molybdenum atoms with surrounding sulfur atoms (VxMo+yS) at a low ion dose. When increasing the ion dose, the atomic vacancies merge and form nanometer-sized holes. Utilizing HR-STEM and image analysis, we propose the estimation of the finite crystal length (Lfc) via the careful quantification of 0D defects in 2D systems through the formula Lfc = 4.41/ηion, where ηion corresponds to the ion dose. Combining HR-STEM and Raman spectroscopy, the formula to calculate Lfc from Raman features, I(LA)/I(A'1) = 5.09/Lfc2, is obtained. We have also demonstrated an effective route to healing the ion irradiation-induced atomic vacancies by annealing defective MoS2 in a hydrogen disulfide (H2S) atmosphere. The H2S annealing improved the crystal quality of MoS2 with Lfc greater than the calculated size of the A exciton wave function, which leads to a partial recovery of the photoluminescence signal after its quenching by ion irradiation.

An Interdisciplinary Approach to Optimize the Care of Transitioning Adolescents and Young Adults with CKD.

Adolescents and young adults (AYAs) with CKD or end-stage kidney disease (ESKD) have unique medical, dental, psychosocial, neurocognitive, and academic needs and require close interdisciplinary collaboration to optimize their care. The etiology of CKD in AYAs is diverse compared to older adults. With their continuously improved survival, AYAs must start preparation for health-care transition (HCT) from pediatric- to adult-focused health care in the pediatric setting and it must continue at the adult-focused setting, given that their brain maturation and self-management skill acquisition occur until their mid-20s. While the growth and physical maturation of most visible body parts occur before 18 years of age, the prefrontal cortex of the brain, where reasoning, impulse control, and other higher executive functions reside, matures around 25 years of age. The HCT process must be monitored using patient- and caregiver-measuring tools to guide interventions. The HCT process becomes more complex when patients and/or caregivers have a language barrier, different cultural beliefs, or lower literacy levels. In this article, we discuss the unique comorbidities of pediatric-onset CKD/ESKD, provide information for a planned HCT preparation, and suggest interdisciplinary coordination as well as cultural and literacy-appropriate activities to achieve optimal patient outcomes.

The effects of a brief supportive psychotherapeutic intervention among hemodialyzed patients: a quasi-experimental study / EFEITOS DE UMA INTERVENÇÃO PSICOTERAPÊUTICA BREVE DE APOIO EM PACIENTES HEMODIALISADOS: estudo quase-experimental / Efectos de una intervención psicoterapéutica breve de apoyo en pacientes en hemodiálisis: estudio casi experimental

ABSTRACT Objectives to assess health-related quality of life and resilience among hemodialyzed patients in the city of Porto, Portugal, before and after the Relaxation, Mental Images and Spirituality psychotherapeutic intervention, and identify factors interfering in these patients' levels of resilience. Method a quasi-experimental study was conducted from November 2018 to April 2019 among 17 patients attending two dialysis centers located in Porto, Portugal. A questionnaire addressing sociodemographic and clinical information was applied together with the Kidney Disease Quality of Life-Short Form, a resilience scale, and a brief psychotherapeutic intervention. Each patient attended three intervention sessions, and the instruments were applied before and after the intervention. The Shapiro-Wilk test was performed to verify the normality of data, while the Student's t-test and Wilcoxon test were performed to compare the means, and linear regression was used to identify resilience-associated factors. Results after the intervention, quality of life perception improved in virtually all the scale's domains, with statistically significant differences in the physical function (p=0.006) and emotional function (p=0.021). The resilience assessment revealed a statistically significant improvement in the post-intervention (p=0.002); linear regression analyses showed that having a religion, other pathologies, or a history of transplant is related to increased resilience levels while taking antidepressants or anti-hypertensive medications negatively affect it. Conclusion the intervention contributed to improving resilience and some domains concerning the patients' quality of life. Thus, it can be implemented among patients undergoing hemodialysis.

RESUMEN Objetivos evaluar la calidad de vida relacionada a la salud y resiliencia de pacientes en hemodiálisis, en la ciudad do Porto, en Portugal, antes y después de la intervención psicoterapéutica: Relajamiento, Imágenes Mentales y Espiritualidad. También, identificar los factores que interfieren en los niveles de resiliencia de estos pacientes. Método estudio casi experimental, realizado en 17 participantes de dos unidades de diálisis de la ciudad de Porto, en Portugal, de noviembre de 2018 a abril de 2019. Fueron utilizados: el cuestionario de caracterización sociodemográfica y clínica, la escala de calidad de vida (Kidney Disease Quality of Life-Short Form), la escala de resiliencia y la intervención psicoterapéutica breve. Cada paciente recibió tres sesiones de intervención, siendo evaluados por los instrumentos arriba listados, antes y después. Fueron utilizadas las pruebas: Shapiro Wilks para verificar la normalidad de los datos, t de Student y de Wilcoxon para comparación de las medias; y, la regresión linear para la identificación de los factores asociados a la resiliencia. Resultados la percepción de la calidad de vida fue mejor en casi todos los dominios de la escala, después de la intervención, con una diferencia estadísticamente significativa en las dimensiones: función física (p=0,006) y función emocional (p=0,021). En la evaluación de la resiliencia, se verificó aumento con significación estadística, en el período después de la intervención (p=0,002). Los análisis de regresión linear revelaron que la religión, otras patologías y el histórico de trasplante, son factores relacionados con el aumento de los niveles de resiliencia; y, el uso de medicamentos antidepresivos y antihipertensivos son factores que pueden interferir en la disminución de la resiliencia. Conclusión la intervención contribuyó para la mejora de la resiliencia y de algunos dominios de la calidad de vida de los pacientes, pudiendo ser estimulada su aplicabilidad en el contexto de los pacientes en hemodiálisis.

RESUMO Objetivos avaliar a qualidade de vida relacionada à saúde e a resiliência de pacientes hemodialisados na cidade do Porto, Portugal, antes e após a intervenção psicoterapêutica Relaxamento, Imagens Mentais e Espiritualidade. Identificar os fatores que interferem nos níveis de resiliência destes pacientes. Método estudo quase-experimental, realizado com 17 participantes de duas unidades de diálise da cidade do Porto, Portugal, de novembro de 2018 a abril de 2019. Foram utilizados questionário de caracterização sociodemográfica e clínica, escala de qualidade de vida (Kidney Disease Quality of Life-Short Form), escala de resiliência, e intervenção psicoterapêutica breve. Cada paciente recebeu três sessões da intervenção, sendo avaliados pelos instrumentos listados antes e depois. Foram utilizados testes de Shapiro Wilks para verificar normalidade dos dados, testes t de Student e de Wilcoxon para comparação das médias e regressão linear na identificação dos fatores associados à resiliência. Resultados a percepção da qualidade de vida foi melhor em quase todos os domínios da escala pós-intervenção, com diferença estatisticamente significativa nas dimensões: função física (p=0,006) e função emocional (p=0,021). Na avaliação da resiliência, verificou-se aumento com significância estatística no período pós-intervenção (p=0,002); análises de regressão linear revelaram que religião, outras patologias e histórico de transplante são fatores relacionados ao aumento dos níveis de resiliência; e uso de medicamentos antidepressivos e anti-hipertensivos são fatores que podem interferir na diminuição da resiliência. Conclusão a intervenção contribuiu para melhora na resiliência e de alguns domínios da qualidade de vida dos pacientes, podendo ser estimulada sua aplicabilidade no contexto dos pacientes em hemodiálise.

Monolayer Vanadium-Doped Tungsten Disulfide: A Room-Temperature Dilute Magnetic Semiconductor.

Dilute magnetic semiconductors (DMS), achieved through substitutional doping of spin-polarized transition metals into semiconducting systems, enable experimental modulation of spin dynamics in ways that hold great promise for novel magneto-electric or magneto-optical devices, especially for two-dimensional (2D) systems such as transition metal dichalcogenides that accentuate interactions and activate valley degrees of freedom. Practical applications of 2D magnetism will likely require room-temperature operation, air stability, and (for magnetic semiconductors) the ability to achieve optimal doping levels without dopant aggregation. Here, room-temperature ferromagnetic order obtained in semiconducting vanadium-doped tungsten disulfide monolayers produced by a reliable single-step film sulfidation method across an exceptionally wide range of vanadium concentrations, up to 12 at% with minimal dopant aggregation, is described. These monolayers develop p-type transport as a function of vanadium incorporation and rapidly reach ambipolarity. Ferromagnetism peaks at an intermediate vanadium concentration of ~2 at% and decreases for higher concentrations, which is consistent with quenching due to orbital hybridization at closer vanadium-vanadium spacings, as supported by transmission electron microscopy, magnetometry, and first-principles calculations. Room-temperature 2D-DMS provide a new component to expand the functional scope of van der Waals heterostructures and bring semiconducting magnetic 2D heterostructures into the realm of practical application.

Spontaneous chemical functionalization via coordination of Au single atoms on monolayer MoS2.

Surface functionalization of metallic and semiconducting 2D transition metal dichalcogenides (TMDs) have mostly relied on physi- and chemi-sorption at defect sites, which can diminish the potential applications of the decorated 2D materials, as structural defects can have substantial drawbacks on the electronic and optoelectronic characteristics. Here, we demonstrate a spontaneous defect-free functionalization method consisting of attaching Au single atoms to monolayers of semiconducting MoS2(1H) via S-Au-Cl coordination complexes. This strategy offers an effective and controllable approach for tuning the Fermi level and excitation spectra of MoS2 via p-type doping and enhancing the thermal boundary conductance of monolayer MoS2, thus promoting heat dissipation. The coordination-based method offers an effective and damage-free route of functionalizing TMDs and can be applied to other metals and used in single-atom catalysis, quantum information devices, optoelectronics, and enhanced sensing.

Cellular metabolic reprogramming controls sugar appetite in Drosophila.

Cellular metabolic reprogramming is an important mechanism by which cells rewire their metabolism to promote proliferation and cell growth. This process has been mostly studied in the context of tumorigenesis, but less is known about its relevance for nonpathological processes and how it affects whole-animal physiology. Here, we show that metabolic reprogramming in Drosophila female germline cells affects nutrient preferences of animals. Egg production depends on the upregulation of the activity of the pentose phosphate pathway in the germline, which also specifically increases the animal's appetite for sugar, the key nutrient fuelling this metabolic pathway. We provide functional evidence that the germline alters sugar appetite by regulating the expression of the fat-body-secreted satiety factor Fit. Our findings demonstrate that the cellular metabolic program of a small set of cells is able to increase the animal's preference for specific nutrients through inter-organ communication to promote specific metabolic and cellular outcomes.

Metabolic cross-feeding in imbalanced diets allows gut microbes to improve reproduction and alter host behaviour.

The impact of commensal bacteria on the host arises from complex microbial-diet-host interactions. Mapping metabolic interactions in gut microbial communities is therefore key to understand how the microbiome influences the host. Here we use an interdisciplinary approach including isotope-resolved metabolomics to show that in Drosophila melanogaster, Acetobacter pomorum (Ap) and Lactobacillus plantarum (Lp) a syntrophic relationship is established to overcome detrimental host diets and identify Ap as the bacterium altering the host's feeding decisions. Specifically, we show that Ap uses the lactate produced by Lp to supply amino acids that are essential to Lp, allowing it to grow in imbalanced diets. Lactate is also necessary and sufficient for Ap to alter the fly's protein appetite. Our data show that gut bacterial communities use metabolic interactions to become resilient to detrimental host diets. These interactions also ensure the constant flow of metabolites used by the microbiome to alter reproduction and host behaviour.